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Finding the Fourth Proportional to 406,171.42, 609,315.45 and 139,860.43

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Solution

The fourth proportional to 406,171.42, 609,315.45 and 139,860.43 is: 209,810.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,171.42 : 609,315.45 = 139,860.43 : x
  2. Step 2: Convert to fraction form
    406,171.42/609,315.45 = 139,860.43/x
  3. Step 3: Cross multiply
    406,171.42x = 609,315.45 × 139,860.43
  4. Step 4: Simplify right side
    406,171.42x = 85,219,118,794.88
  5. Step 5: Solve for x
    x = 85,219,118,794.88/406,171.42
  6. Step 6: Final answer
    x = 209,810.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.